Off South Africas southwest coast, a rocksucker lies in wait, eyeing a nearby limpet (not visible). Suddenly, prompted by a wobble of the limpets shell, this puffy-cheeked stalker will leap from its bed of urchins, clamp big teeth over its prey, throw back its head, and swallow it whole. An x-ray of the above specimen would likely reveal a pile of shells neatly stacked in the stomach, explains Charlie Griffiths, a University of Cape Town marine biologist and rocksucker admirer. From there, he says, the shells are either regurgitated or passed through the large, flabby anus. What a fish!